Build 'blinky' (Zephyr SDK 0.17.4) fails while loading 'libusb-0.1.so.4'

[ebold]

Building the 'samples/basic/blinky' app fails by loading the 'libusb-0.1.so.4' shared library.
As target 'nrf5340dk/nrf5340/cpuapp' board is chosen.

Here is a part of the output message:

...
$HOME/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/usr/bin/dtc: error while loading shared libraries: libusb-0.1.so.4: cannot open shared object file: No such file or directory
CMake Error at $HOME/prv_prj/zephyrproject/zephyr/cmake/modules/dts.cmake:388 (execute_process):
  execute_process failed command indexes:

    1: "Child return code: 127"

Inspection of required shared libraries for 'dtc' shows that 'libusb-0.1.so.4' is installed and exists:

$ ldd /home/ebold/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/usr/bin/dtc
	linux-vdso.so.1 (0x00007ffcd77f6000)
	/opt/Xilinx/usb-driver/libusb-driver.so (0x00007fe980000000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fe97fdd7000)
	libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fe98039a000)
	libusb-0.1.so.4 => /lib/x86_64-linux-gnu/libusb-0.1.so.4 (0x00007fe98038d000)
	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fe980388000)
	$HOME/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/lib/ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2 (0x00007fe9803e7000)

$ dpkg -l | grep usb
...
ii  libusb-0.1-4:amd64        2:0.1.12-32build3              amd64        userspace USB programming library
...

$ dpkg -L libusb-0.1-4
/.
/lib
/lib/x86_64-linux-gnu
/lib/x86_64-linux-gnu/libusb-0.1.so.4.4.4
...

$ ll /lib/x86_64-linux-gnu/libusb* -h
lrwxrwxrwx 1 root root   19 Mar 24  2022 /lib/x86_64-linux-gnu/libusb-0.1.so.4 -> libusb-0.1.so.4.4.4
-rw-r--r-- 1 root root  35K Mar 24  2022 /lib/x86_64-linux-gnu/libusb-0.1.so.4.4.4
...

Even an installation attempt shows that the library is actual.

$ sudo apt install libusb-0.1-4
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
libusb-0.1-4 is already the newest version (2:0.1.12-32build3).

What is going here wrong? Grateful for your support.

[ebold]

Path to the shared library is also in the run-time linker cache:

$ ldconfig -p | grep libusb-0.1
	libusb-0.1.so.4 (libc6,x86-64) => /lib/x86_64-linux-gnu/libusb-0.1.so.4

[ebold]

Found out that native 'dtc' works but 'dtc' provided in Zephyr SDK not:

$ which dtc
/usr/bin/dtc
$ dtc --version
Version: DTC 1.6.1
$ ~/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/usr/bin/dtc --version
/home/me/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/usr/bin/dtc: error while loading shared libraries: libusb-0.1.so.4: cannot open shared object file: No such file or directory

$ ldd /usr/bin/dtc 
	linux-vdso.so.1 (0x00007ffc6d6f5000)
	/opt/Xilinx/usb-driver/libusb-driver.so (0x00007ff4f9c00000)
	libyaml-0.so.2 => /lib/x86_64-linux-gnu/libyaml-0.so.2 (0x00007ff4f9e24000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007ff4f99d7000)
	libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007ff4f9e1f000)
	libusb-0.1.so.4 => /lib/x86_64-linux-gnu/libusb-0.1.so.4 (0x00007ff4f9e12000)
	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007ff4f9e0b000)
	/lib64/ld-linux-x86-64.so.2 (0x00007ff4f9e8c000)

[yvesll]

HI, which linux distribution you are using? It works properly in my WSL2 (Ubuntu 24.04)

-- Found host-tools: zephyr 0.17.4 (/home/yves/zephyr-sdk-0.17.4)
-- Found toolchain: zephyr 0.17.4 (/home/yves/zephyr-sdk-0.17.4)
-- Found Dtc: /home/yves/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/usr/bin/dtc (found suitable version "1.7.0", minimum required is "1.4.6")
....
[156/156] Linking C executable zephyr/zephyr.elf
Memory region         Used Size  Region Size  %age Used
           FLASH:       21544 B         1 MB      2.05%
             RAM:        4440 B       448 KB      0.97%
        IDT_LIST:          0 GB        32 KB      0.00%
Generating files from /home/yves/Repos/zephyrproject/zephyr/build/zephyr/zephyr.elf for board: nrf5340dk

(.venv) ➜  zephyr git:(main) ldd /home/yves/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/usr/bin/dtc
        linux-vdso.so.1 (0x00007fff681fc000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fc5f0c72000)
        /home/yves/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/lib/ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2 (0x00007fc5f0eb5000)

[ebold]

I've solved the issue in a hacky way!

Checking the loader of the SDK's 'dtc' showed that it uses its own runtime loader:

$ readelf -a ~/zephyr-sdk-0.17.4/sysroots/.../usr/bin/dtc | grep 'program interpreter'
      [Requesting program interpreter: /home/me/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/lib/ld-linux-x86-64.so.2]
readelf: Warning: Separate debug info file /home/me/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/usr/bin/dtc found, but CRC does not match - ignoring

Since 'libusb-0.1.so.4' does not exist in the SDK's library folder (~/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/usr/lib/), I've created there a symbolic link to the system 'libusb-0.1.so.4'.

$ cd ~/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/usr/lib
$ ln -s /lib/x86_64-linux-gnu/libusb-0.1.so.4 libusb-0.1.so.4
$ ~/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/usr/bin/dtc --version
Version: DTC v1.7.0+

Finally building example application succeeds for a given board:

$ west build -p auto -b nrf5340dk/nrf5340/cpuapp samples/basic/blinky
-- west build: generating a build system
Loading Zephyr default modules (Zephyr base (cached)).
-- Application: /home/me/prv_prj/zephyrproject/zephyr/samples/basic/blinky
-- CMake version: 3.22.1
-- Cache files will be written to: /home/me/.cache/zephyr
-- Zephyr version: 4.3.99 (/home/me/prv_prj/zephyrproject/zephyr)
-- Found west (found suitable version "1.5.0", minimum required is "0.14.0")
-- Board: nrf5340dk, qualifiers: nrf5340/cpuapp
-- Found host-tools: zephyr 0.17.4 (/home/me/zephyr-sdk-0.17.4)
-- Found toolchain: zephyr 0.17.4 (/home/me/zephyr-sdk-0.17.4)
-- Found Dtc: /home/me/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/usr/bin/dtc (found suitable version "1.7.0", minimum required is "1.4.6") 
-- Found BOARD.dts: /home/me/prv_prj/zephyrproject/zephyr/boards/nordic/nrf5340dk/nrf5340dk_nrf5340_cpuapp.dts
-- Generated zephyr.dts: /home/me/prv_prj/zephyrproject/zephyr/build/zephyr/zephyr.dts
-- Generated pickled edt: /home/me/prv_prj/zephyrproject/zephyr/build/zephyr/edt.pickle
-- Generated devicetree_generated.h: /home/me/prv_prj/zephyrproject/zephyr/build/zephyr/include/generated/zephyr/devicetree_generated.h
Parsing /home/me/prv_prj/zephyrproject/zephyr/Kconfig
Loaded configuration '/home/me/prv_prj/zephyrproject/zephyr/boards/nordic/nrf5340dk/nrf5340dk_nrf5340_cpuapp_defconfig'
Merged configuration '/home/me/prv_prj/zephyrproject/zephyr/samples/basic/blinky/prj.conf'
Configuration saved to '/home/me/prv_prj/zephyrproject/zephyr/build/zephyr/.config'
Kconfig header saved to '/home/me/prv_prj/zephyrproject/zephyr/build/zephyr/include/generated/zephyr/autoconf.h'
-- Found GnuLd: /home/me/zephyr-sdk-0.17.4/arm-zephyr-eabi/arm-zephyr-eabi/bin/ld.bfd (found version "2.38") 
-- The C compiler identification is GNU 12.2.0
-- The CXX compiler identification is GNU 12.2.0
-- The ASM compiler identification is GNU
-- Found assembler: /home/me/zephyr-sdk-0.17.4/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc
-- Using ccache: /usr/bin/ccache
-- Found gen_kobject_list: /home/me/prv_prj/zephyrproject/zephyr/scripts/build/gen_kobject_list.py
-- Configuring done
-- Generating done
-- Build files have been written to: /home/me/prv_prj/zephyrproject/zephyr/build
-- west build: building application
[1/156] Preparing syscall dependency handling

[3/156] Generating include/generated/zephyr/version.h
-- Zephyr version: 4.3.99 (/home/me/prv_prj/zephyrproject/zephyr), build: v4.3.0-977-gdda100cb28c5
[156/156] Linking C executable zephyr/zephyr.elf
Memory region         Used Size  Region Size  %age Used
           FLASH:       21544 B         1 MB      2.05%
             RAM:        4440 B       448 KB      0.97%
        IDT_LIST:          0 GB        32 KB      0.00%
Generating files from /home/me/prv_prj/zephyrproject/zephyr/build/zephyr/zephyr.elf for board: nrf5340dk

I assume the issue is not really related to the Zephyr SDK, indeed more or less to 'libusb', which is loaded by Xilinx USB driver:

$ ldd /home/ebold/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/usr/bin/dtc
	...
	/opt/Xilinx/usb-driver/libusb-driver.so (0x00007fe980000000)  ### Xilinx USB driver
        ...
	libusb-0.1.so.4 => /lib/x86_64-linux-gnu/libusb-0.1.so.4 (0x00007fe98038d000)
	...
	/home/me/zephyr-sdk-0.17.4/sysroots/x86_64-pokysdk-linux/lib/ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2 (0x00007fe9803e7000)  ### SDK's own runtime loader

BTW, I'm using the Linux Mint 21.3. Thanks @yvesll for your cross check.